Snap switch



C. AALBORG SNAP SWITCH Filed A1121. 1'7, 1920 WITNESSES: INVENTOR (I 62222113022 Cid/hazy 1 ATTORNEY Patented Dec. 16, 1924.

UNITED STATES PATENT OFFICE.

CHRISTIAN AALBORG, PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- VANIA.

SNAP SWITCH.

Application filed August 17, 1920. Serial No. 404,126.

To all whom it may concern:

Be it known that I, CHRISTIAN AALBORG, acitizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Snap Switches, of which the following is a specification.

My invention relates to electric snap 19 switches, and it has for its object the provision of a switch which shall be simple in construction and comprise a small number or parts, and in which sim licity and cheapness of construction are e ected without any loss in efiiciency or durability.

Referring to the drawings-- Fig. 1 is a plan view of the switch.

Fig. 2 is an end elevation, and 4 Fig. 3 is a side-view, with a portion of the 29 frame removed to more clearly show the working parts. I

Referring particularly to Fig. 3, I pro- -vide a base 4, made of non-conducting material, on which are mounted the usual posts 7 contacts 8, and a frame 9.

Pivoted on the posts 7 are 'a pair of switch blades 10 to engage the contacts 8, when in closed position. Cbnnecting the blades 10, .is a cross head 11, made of a material which is non-conducting; and fastened to the cross head, intermediate its ends, is a bracket 12 which has an extension, at its lower end, to limit the downward movement of the blades, and, at its upper end, is connected to the outer end of a coil spring 13.

The frame 9 is made of one piece, of substantially U-shape, as shown more clearly in Fig. 2. Pivoted in the frame, at 14, is a handle 15, having an arm 16 which is connected to the inner end of the coil spring 13. The inner end of the handle v15 is provided with shoulders 18 and 19 with which a pin 17 coacts to limit the movement of the handle, in either direction. The arm 16 may either be madeintegral with the handle 15 or be secured thereto in any desired manner.

The operation of the switch is as follows:

With the switch in its on, or closed,

0 position, as shown in the, drawing, thespring 13, bein under tension, exerts an mwar pull which holds the blades in the position occupied. If, now, the handle be moved to off position, its rotative movement on the position, the action just described is reversed,

and the blades are again brought into engagement with the contacts 8.

I claim as my invention 1. In a snap switch, a base, a frame, a movable contact member pivotally mounted on the base, a bracket secured to the movable contact member and provided with an outwardly extending portion, a handle pivotally.supported in the frame and provided with an arm extending inwardly past the said outer portion of the bracket, and a spring interposed between the said arm and the outer portion of the bracket and adapted to maintain the bracket under tension.

2. A snap switch, comprising, in combination, a frame, a pair of blades pivotally mounted at one end, their other ends cooperating with a pair of contacts, an insulated cross bar connecting the two blades intermediate their ends, a bracket moimted on the cross bar to serve as a stop member for limiting the downward movement of the blades and also serving as a spring support, an operating handle pivoted in the frame, a stop member on the frame, for limiting the movement of the handle, in either direction, an arm secured to the handle and movable therewith, and a coil spring having one end connected to the said arm and its other end connected to the said bracket.

3. In a snap switch, a base, .a frame, a

movable contact member pivotally mounted on the base, a bracket secured to the movable contact member and provided with an outwardly extending portion, a handle pivotal- 1y supported in the frame and provided with an arm extending inwardly past the said outer portion of the bracket, a spring intersed between the said arm and the outer portion of the bracket and adapted to maintain the bracket under tension, and a stop member on the frame for-limiting the movement of the handle.

4. In a snap switch, a base, a pair movable contact members pivotally mounted,

on the base, a frame secureti the base between the movable contact members a bracket secured to the movable contact members and provided with an outwardly en itending portion, a handle pivotaiiy sun portesi in the frame and provide-5' with an arm extending inwardly past the said. 011139; portion of the bracke anci a spring inter posed between the said am am. the onteit portion of the bracket ane. adapteoi to main-- tain the bracket untien tension 5. in a snap switch, a base; a frame mounteti on the hase,-a switch hiacie having one enci pivotaiiy supported on the base, a switch-blade contact mounted i position to be engaged by the free en the blade, a bracketmountedi on the switch biade new the free end thereof, a coil spring: normally under tension and having one end connected to the bracket, opera-ting handle pivoted. in the frame, an. aim secureai to the nancile and movable therewith a, a connection between the othe nd, of sai i coil spring and the handle wnereoy when the handle is moved to open noeitioi'n, the angle of puii exerteo'i by the spring is ehangeti to cause the Made to move out of engagementwith the contact and when the handiie moved to. cioseoi position the direction of nail is changed to move the blade again into en gegemen with the contact In testimony whereof, I have hese'untc subscribed my name this 4th day oi August- 1920 G -ZRESTIAIJ' AMLBQRG, 

